dimethyl sulfide/cárie dentária

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[Analysis of volatile sulfur compounds production of oral cavity in preschool children and influencing factors].

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OBJECTIVE To investigate the prevalence of volatile sulfur compounds(VSC) in oral cavity of preschool children, and to analyze related factors, thus to provide scientific basis for the prediction and treatment of halitosis. METHODS The VSC content (hydrogen sulfide, methyl mercaptan, dimethyl

Temperature and pressure dependence of the rate constants of the reaction of NO3 radical with CH3SCH3.

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The reaction of nitrate radical with dimethyl sulfide was studied with cavity ring-down spectroscopy in 20-200 Torr of N2 diluent in the temperature range of 283-318 K. The rate constant for this reaction, k(1), is found to be temperature dependent and pressure independent: k1 = 4.5(-2.8)(+4.0) x

Crystal structure of dimethyl sulfoxide reductase from Rhodobacter capsulatus at 1.88 A resolution.

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The periplasmic dimethyl sulfoxide reductase (DMSOR) from the photosynthetic purple bacterium Rhodobacter capsulatus functions as the terminal electron acceptor in its respiratory chain. The enzyme catalyzes the reduction of highly oxidized substrates like dimethyl sulfoxide to dimethyl sulfide. At

Isolation, cloning, sequence analysis and X-ray structure of dimethyl sulfoxide/trimethylamine N-oxide reductase from Rhodobacter capsulatus.

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The periplasmic enzyme dimethyl sulfoxide/trimethylamine N-oxide reductase (DMSOR/TMAOR) from the photosynthetic purple bacterium Rhodobacter capsulatus functions as the terminal electron acceptor in its respiratory chain. The enzyme catalyzes the reduction of highly oxidized substrates like

Halitosis and Helicobacter pylori infection.

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There is disagreement about a possible relationship between Helicobacter pylori (H. pylori) infection and objective halitosis, as established by volatile sulfur compounds (VSCs) in the breath. Many studies related to H. pylori used self-reported halitosis, a subjective and unreliable method to

Extra-oral halitosis: an overview.

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Halitosis can be subdivided into intra-oral and extra-oral halitosis, depending on the place where it originates. Most reports now agree that the most frequent sources of halitosis exist within the oral cavity and include bacterial reservoirs such as the dorsum of the tongue, saliva and periodontal

Solventless supramolecular chemistry via vapor diffusion of volatile small molecules upon a new trinuclear silver(I)-nitrated pyrazolate macrometallocyclic solid: an experimental/theoretical investigation of the dipole/quadrupole chemisorption phenomena.

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A comparative study on the tendency of a new trinuclear silver(I) pyrazolate, namely, [N,N-(3,5-dinitropyrazolate)Ag]3 (1), and a similar compound known previously, [N,N-[3,5-bis(trifluoromethyl)pyrazolate]Ag]3 (2), to adsorb small volatile molecules was performed. It was found that 1 has a

Association between oral malodor and adult periodontitis: a review.

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BACKGROUND Bad breath has a significant impact on our daily social life to those who suffer from it. The majority of bad breath originates within the oral cavity. However, it is also possible that it can come from other sources such as gastric-intestine imbalance. The term "oral malodor" is used to

Drug-related oral malodour (halitosis): a literature review.

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Dry mouth (xerostomia), is a fairly common, well-researched condition, which is an indirect cause of oral malodour. This systematic literature review looked into another cause of bad breath: adverse drug reactions in the orofacial region causing halitosis. The study focused on extraoral halitosis,

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